WIXLIB

Chapter 5: How to Install PluginsIntroductionPlugins help us to do things easier. Intellij provides a vast range of plugins for various technologies/ laguages. There are three ways to install plugin in Intellij.ExamplesTo download and install a repository plugin1. Go to File -- Settings (e.g. Ctrl Alt S ).2. In the left-hand pane, select Plugins.3.On the Plugins window, click "Install JetBrains plugin" or the "Browse repositories button".To install a plugin from the disk1. Go to File -- Settings (e.g. Ctrl Alt S ).2. In the left-hand pane, select Plugins.3. On the Plugins window, click "Install plugin from disk button".4. Select the desired plugin from your local machine.Click Apply button of the Settings/Preferences dialog.https://riptutorial.com/31

Or you can directly add pugins from the other venders by directly searching the repositories.1. Go to "Browse Repositories"2. Select the category (on the top of the window) that you need to search(or just search bythe name if you know it).3. Install it.https://riptutorial.com/32

Read How to Install Plugins online: ow-to-installpluginshttps://riptutorial.com/33

Chapter 6: IdeaVimRemarksIdeaVim is a plugin for IDEA products that aims in providing Vim functionality in editor viewsExamplesShowing line numbersAs of IntelliJ IDEA version 2016.2, and IdeaVim version 0.46, IntelliJ's native option for showing linenumbers is ineffective. When clicking Show line numbers, the line numbers immediately show anddisappear.This problem is caused by a bug in the IdeaVim plugin, which can be resolved by using the Vimcommand for showing line numbers::set numberand:set nonumberto hide.These commands can also be used as the shorthand :setnuand :setnonu.If you wish to activate the feature which shows relative line numbers instead you can use:set relativenumberor a shorthand :setrnu.Remember that you can mix setrelativenumberwith setnumber.Allocating conflicting keystrokes to IdeaVimBy default, some keystrokes that are useful in Vim contradict with the keystrokes of IntelliJ.For example, R in Vim is 'redo', but in IntelliJ it's the shortcut for RunTo decide which program interprets the keystroke, go to Preferences - Other Settings - VimEmulation and choose which keystrokes to use with IdeaVim and which to use with IntelliJ:https://riptutorial.com/34

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Chapter 7: InspectionsIntroductionIntellij IDEA provides lots of code inspections, that can significantly simplify writing code.Inspections parameters can be found in Preferences Editor Inspections section. By default, IDEAhas lots of them enabled. And lots of inspections support auto-fixing options, that can be seen onpressing Alt Enter.To run inspections for your whole project (or some custom scope), you need to select Analyze Inspect code.Examples@NotNull / @Nullable inspectionsThese inspections are extremely useful for preventing NullPointerExceptions. By default they aredisabled. You can find these inspections in Inspections preferences: Java Probable bugs Constantconditions & exceptions and @NotNull/@Nullable problems. There you can also configure yourannotations. You can use this manual to add JetBrains annotations into your project.For example, consider this methods:If getString can't possibly return null, everything is fine. But if we enable our inspections and insome cases it can return null, we will immediately will see inspection triggered:which says 'null' is returned by the method which is not declared as @Nullable. And if we hit Alt Enter, there will be an option Annotate method as '@Nullable'. If we hit Enter again, our code willlook like that:https://riptutorial.com/36

with inspection triggered on length() method saying Method invocation 'length' may produce'java.lang.NullPointerException'. And if we go further and introduce the result of getString()method as a variable, after hitting Alt Enter IDEA will suggest a few ways to fix this inspection:This way you can inspect your code on-the-fly, and fix all potential NullPointerExceptions. If youwant to check your whole project (or some random scope), you can use Analyze Inspect code.Just make sure that your selected inspections profile has all necessary inspections enabled.Read Inspections online: nspectionshttps://riptutorial.com/37

Chapter 8: Little-known featuresExamplesLanguage injectionIf you want to write strings containing other languages (JSON, regexes), it's hard to keep up withescaping symbols, and it would be nice to get some code assist.1. Put your cursor inside an empty string2. ALT ENTER3. Pick "Inect language or reference"4. Pick the desirable language (RegExp in my case) from the pop-up5. Again use ALT ENTERand pick Editregex fragment6. In the new tool window enter the regex - note how it's automatically mapped to a properlyescaped Java string. Similarly for JSON the indents will be placed properly.Quick PreviewCheck screencast video on YouTube about this featurehttps://riptutorial.com/38

IntelliJ provides a quick-preview feature called Viewing Definition. Using this feature allows a userto quickly see the contents of a method/class without navigating into the class itself OS X - ( Y) or ( Space) Unix / Windows - Ctrl Shift IExample: Looking into Arrays.copyOfRange():Verifying if you've selected the right class in Search:https://riptutorial.com/39

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ittle-known-featureshttps://riptutorial.com/41

Chapter 9: Live TemplatesExamplesAdd a test method easily@org.junit.Testpublic void should name () { END }Make sure to check the Shorted FQ names box when creating this template.When you type "should" (the abbreviation), this will add the necessary importstatement at the top of the file, and this code:org.junit.Test;@Testpublic void should () {}It is thanks to the Shorten FQ names option that @org.junit.Test is reduced to simply @Test.The name variable is irrelevant, it could be named something else. The purpose of that variable isthat when the template is inserted in the class, the cursor will be placed in the position of name ,asking you to enter something.https://riptutorial.com/42

After you entered a value for name (effectively the name of the test method), the cursor will finallyjump to END , a built-in variable, so that you can carry on and implement the test case.Insert the name of the current classConsider the utility class pattern: a class with only static methods and no fields. It's recommendedto prevent instantiation of such classes by adding a private a constructor.This live template example makes it easy to add a private constructor to an existing class, usingthe name of the enclosing class.private className () {throw new AssertionError("utility class, forbidden constructor");}Applicable in Java: declaration scope.Click Edit variables to define the className variable as the built-in className() expression, andcheck the Skip if defined box to avoid prompting for a custom name, which is unnecessary in thisexample.https://riptutorial.com/43

For example, inside a class like this:class ListUtils {// .}When you type "utility class" (the abbreviation), this will insert a constructor like this:class ListUtils {private ListUtils() {throw new AssertionError("utility class, forbidden constructor");}// .}Read Live Templates online: ive-templateshttps://riptutorial.com/44

Chapter 10: OptimizationExamplesCustomizing the VM OptionsYou can override the default vmoptions with your own personal settings by choosing Help EditCustom VM Options from the toolbar. This will create a local copy of the file which you are free toedit.For example, if you double the value set for Xmx, the maximum size of the memory allocation poolwill be doubled after you restart the IDE. On many machines this will lead to faster performance.See the options here for a description of each parameter.Read Optimization online: ptimizationhttps://riptutorial.com/45

Chapter 11: Useful ShortcutsExamplesCompile and RunMake project (compile modifed anddependent)Windows: Ctrl F9OS X / macOS: Cmd F9Compile selected file, package or moduleThis is useful to know, as when debugging this shortcut can be used to quickly reload / hotswapclasses.Windows: Ctrl Shift F9OS X / macOS: Cmd Shift F9Select configuration and runWindows: Alt Shift F10OS X / macOS: Option Shift F10Select configuration and debugWindows: Alt Shift F9OS X / macOS: Option Shift F9https://riptutorial.com/46

RunShift F10DebugShift F9Run context configuration from editorWindows: Ctrl Shift F10OS X / macOS: Cmd Shift F10Code CompletionBasic code completion (the name of anyclass, method or variable)Windows: Ctrl SpaceOS X / macOS: Cmd SpaceSmart code completion (filters the list ofmethods and variables by expected type)Windows: Ctrl Shift SpaceOS X / macOS: Cmd Shift SpaceOverwriting code with a suggestionTabhttps://riptutorial.com/47

Adding code from a completion suggestionEnterSearch/ReplaceSearch everywhereDouble ShiftFindWindows / Linux: Ctrl FOS X / macOS: Cmd FFind nextF3Find previousShift F3ReplaceWindows / Linux: Ctrl ROS X / macOS: Cmd RFind in pathWindows / Linux: Ctrl Shift FOS X / macOS: Cmd Shift Fhttps://riptutorial.com/48

Replace in pathWindows / Linux: Ctrl Shift ROS X / macOS: Cmd Shift RRefactoringCopyF5MoveF6Safe deleteWindows / Linux: Alt DeleteOS X / macOS: Cmd DeleteNote that the Delete key on OS X / macOS is the equivalent of the Backspace key on otheroperating systems.RenameShift F6Extract MethodWindows / Linux: Ctrl Alt MOS X / macOS: Cmd Option MExtract Fieldhttps://riptutorial.com/49

Windows / Linux: Ctrl Alt FOS X / macOS: Cmd Option FExtract VariableWindows / Linux: Ctrl Alt VOS X / macOS: Cmd Option VExtract ConstantWindows / Linux: Ctrl Alt COS X / macOS: Cmd Option CExtract ParameterWindows / Linux: Ctrl Alt POS X / macOS: Cmd Option POtherSurround withSurrounds a code block with an if, for, editor-fold. and more.Windows / Linux: Ctrl Alt TOS X / macOS: Cmd Option TBasic navigationGo to editor (from tool window)https://riptutorial.com/50

EscSwitching focus to corresponding toolwindowWindows: Alt tool window number OS X / macOS: Cmd tool window number For example switching focus to the projectwindowWindows: Alt 1OS X / macOS: Cmd 1Recent files popupWindows: Ctrl EOS X / macOS: Cmd EFind ActionWindows: Ctrl Shift AOS X / macOS: Cmd Shift ANavigate toFile : Windows: Ctrl Shift Nhttps://riptutorial.com/51

OS X / macOS: Cmd Shift NClass : Windows: Ctrl N OS X / macOS: Cmd NSymbol (class/method/variable/constantname) : Windows: Ctrl Alt Shift N OS X / macOS: Cmd Option Shift NNote that you can use class name to narrow down the method/variable/constant search, forexample to find symbol usersCollection in class UserDAO type:UserDAO.usersCollectionEverywhere : Windows: Shift Shift OS X / macOS: Shift ShiftTo search for something that has multiple words, e.g., InetAddressCachePolicy you can just typeInAddCacPo or something similar that contains parts of words in the whole name.Go to line numberWindows: Ctrl GOS X / macOS: Cmd Lhttps://riptutorial.com/52

Go back to last edit locationWindows: Ctrl Shift BackspaceOS X / macOS: Cmd Shift BackspaceUsage SearchFind usages / Find usages in fileWindows / Linux: Alt F7 / Ctrl F7OS X / macOS: Option F7 / Ctrl F7Highlight usages in fileWindows / Linux: Ctrl Shift F7OS X / macOS: Cmd Shift F7Show usagesWindows / Linux: Ctrl Alt F7OS X / macOS: Cmd Option F7Show Method ParametersWindows / Linux: Ctrl POS X / macOS: Cmd PShows what parameters a method and all of its overloads accepts.https://riptutorial.com/53

SelectionSelection with increasing scopeThis comes handy when you want to select a block to extract a variable / method etc, no need todo a precise bracket matching, just put the caret somewhere in the statement and keep doing thisWindows: Ctrl WOS X / macOS: Cmd WSelection with decreasing scopeWindows: Ctrl Shift WOS X / macOS: Cmd Shift WThis feature is also very useful when editing / playing with json documents in your IDE.Vertical selectionPress and holdWindows: AltOS X / macOS: Optand select normally using mouse / trackpad (the way you select a word in a row etc)This is how it should look likehttps://riptutorial.com/54

Multiple caretsPress and holdWindows: Alt ShiftOS X / macOS: Opt Shiftand click where all you want to put a caret. You can choose to put multiple carets in a single line oracross lines at different positions.Now you can perform all operations that you would have been able to perform on a single selectedword (hold Ctrl (windows) or option (mac OS) and use Left or Right keys to jump across words)and all those will affect all caret positions.You can even cut / paste multiple selections from one place to another.Having multiple carets is very usefult when you want to change the structure of text across manylines / many positions in same line.Selecting duplicate occurencesSelect some text and pressWindows: Alt JOS X / macOS: ctrl Gto select the next occurance of the same text.You get one caret at each of the selected occurrence that could be used to change eachoccurrence simultaneously.E.g., I've tried to put an example in this gif, hope it helpshttps://riptutorial.com/55

Read Useful Shortcuts online: seful-shortcutshttps://riptutorial.com/56

CreditsS.NoChaptersContributors1Getting started withintellij-ideaCommunity, CraftedCart, foxtrot9, Harmelodic, Jeeter2Database Toolskassak3ExportingJeeter4Hibernate HQLconsole andinspectionsShai Givati5How to InstallPluginsPriya, RamenChef, Sudeepa Nadeeshan6IdeaVimJeeter, Mateusz Piotrowski, mnoronha, sevenforce7Inspectionsesin888Little-known featuresAnton Dozortsev, Jeeter, mszymborski, Prateek9Live Templatesjanos10OptimizationKevin Cooper11Useful ShortcutsCraftedCart, karel, mszymborski, Nadim Bahadoor, Prateekhttps://riptutorial.com/57

Community edition is free and is not lacking for features in terms of Java SE development. Windows & Linux Download IntelliJ IDEA from the JetBrains website, and follow installation procedures. If the Java Development Kit (JDK) is not installed, download